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100 lines
3.8 KiB
C++
100 lines
3.8 KiB
C++
#include "Storages/StorageAzureBlobCluster.h"
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#include "config.h"
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#if USE_AZURE_BLOB_STORAGE
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#include <DataTypes/DataTypeString.h>
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#include <IO/ConnectionTimeouts.h>
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#include <Interpreters/AddDefaultDatabaseVisitor.h>
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#include <Interpreters/InterpreterSelectQuery.h>
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#include <Processors/Sources/RemoteSource.h>
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#include <Processors/Transforms/AddingDefaultsTransform.h>
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#include <QueryPipeline/RemoteQueryExecutor.h>
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#include <Storages/IStorage.h>
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#include <Storages/StorageURL.h>
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#include <Storages/SelectQueryInfo.h>
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#include <Storages/StorageDictionary.h>
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#include <Storages/extractTableFunctionArgumentsFromSelectQuery.h>
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#include <Storages/getVirtualsForStorage.h>
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#include <Common/Exception.h>
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#include <Parsers/queryToString.h>
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#include <TableFunctions/TableFunctionAzureBlobStorageCluster.h>
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#include <memory>
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#include <string>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int LOGICAL_ERROR;
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}
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StorageAzureBlobCluster::StorageAzureBlobCluster(
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const String & cluster_name_,
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const StorageAzureBlob::Configuration & configuration_,
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std::unique_ptr<AzureObjectStorage> && object_storage_,
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const StorageID & table_id_,
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const ColumnsDescription & columns_,
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const ConstraintsDescription & constraints_,
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ContextPtr context_,
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bool structure_argument_was_provided_)
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: IStorageCluster(cluster_name_, table_id_, &Poco::Logger::get("StorageAzureBlobCluster (" + table_id_.table_name + ")"), structure_argument_was_provided_)
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, configuration{configuration_}
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, object_storage(std::move(object_storage_))
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{
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context_->getGlobalContext()->getRemoteHostFilter().checkURL(configuration_.getConnectionURL());
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StorageInMemoryMetadata storage_metadata;
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if (columns_.empty())
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{
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/// `format_settings` is set to std::nullopt, because StorageAzureBlobCluster is used only as table function
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auto columns = StorageAzureBlob::getTableStructureFromData(object_storage.get(), configuration, /*format_settings=*/std::nullopt, context_, false);
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storage_metadata.setColumns(columns);
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}
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else
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storage_metadata.setColumns(columns_);
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storage_metadata.setConstraints(constraints_);
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setInMemoryMetadata(storage_metadata);
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auto default_virtuals = NamesAndTypesList{
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{"_path", std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>())},
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{"_file", std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>())}};
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auto columns = storage_metadata.getSampleBlock().getNamesAndTypesList();
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virtual_columns = getVirtualsForStorage(columns, default_virtuals);
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for (const auto & column : virtual_columns)
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virtual_block.insert({column.type->createColumn(), column.type, column.name});
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}
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void StorageAzureBlobCluster::addColumnsStructureToQuery(ASTPtr & query, const String & structure, const ContextPtr & context)
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{
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ASTExpressionList * expression_list = extractTableFunctionArgumentsFromSelectQuery(query);
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if (!expression_list)
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throw Exception(ErrorCodes::LOGICAL_ERROR, "Expected SELECT query from table function s3Cluster, got '{}'", queryToString(query));
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TableFunctionAzureBlobStorageCluster::addColumnsStructureToArguments(expression_list->children, structure, context);
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}
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RemoteQueryExecutor::Extension StorageAzureBlobCluster::getTaskIteratorExtension(ASTPtr query, const ContextPtr & context) const
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{
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auto iterator = std::make_shared<StorageAzureBlobSource::GlobIterator>(
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object_storage.get(), configuration.container, configuration.blob_path,
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query, virtual_block, context, nullptr);
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auto callback = std::make_shared<std::function<String()>>([iterator]() mutable -> String{ return iterator->next().relative_path; });
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return RemoteQueryExecutor::Extension{ .task_iterator = std::move(callback) };
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}
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NamesAndTypesList StorageAzureBlobCluster::getVirtuals() const
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{
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return virtual_columns;
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}
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}
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#endif
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